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DA14530 Datasheet(PDF) 72 Page - Renesas Technology Corp |
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DA14530 Datasheet(HTML) 72 Page - Renesas Technology Corp |
72 / 333 page DA14530 Low Power Bluetooth 5.1 SoC Final Datasheet Revision 3.4 21-Dec-2021 CFR0011-120-00 72 of 332 © 2021 Renesas Electronics 11.2.1 OTP Accessing Considerations Accesses to the OTP memory (read/write) can only be performed at certain voltage ranges. Users are responsible for meeting these conditions while accessing the OTP. The recommended operation conditions of the OTP memory can be found under Recommended Operating Conditions section. 11.3 Programming To configure the OTP controller, following the sequence of steps below: 1. Enable clock for OTP controller by setting the CLK_AMBA_REG[OTP_ENABLE] bit. 2. Put the OTP in STBY mode (OTPC_MODE_REG[OTPC_MODE_MODE] = 0x1). 3. Wait for OTP mode to change (OTPC_STAT_REG[OTPC_STAT_MRDY] = 1). 4. Set OTP speed by writing OTPC_TIM1_REG and OTPC_TIM2_REG if system clock speed is to be reduced. These numbers basically generate asynchronous timing signals towards the OTP cell that comply to the default internal 16 MHz bus speed. 5. Perform an OTP access: a. Programming: i. Set up OTP write mode (OTPC_MODE_REG[OTPC_MODE_MODE] = 0x3). ii. Wait for OTP mode to change (OTPC_STAT_REG[OTPC_STAT_MRDY] = 1). iii. Check OTPC_STAT_REG[OTPC_STAT_PBUF_EMPTY] = 1 iv. Write the data to be programmed to OTPC_PWORD_REG. v. Write the address to which the data to be programed to OTPC_PADDR_REG. vi. Wait until the programming is finished (OTPC_STAT_REG[OTPC_STAT_PRDY] = 1). vii. Switch to OTP verify mode (OTPC_MODE_REG[OTPC_MODE_MODE] = 0x4). viii. Wait for OTP mode to change (OTPC_STAT_REG[OTPC_STAT_MRDY] = 1). ix. Read back and compare the data written. x. Put the OTP in STBY mode (OTPC_MODE_REG[OTPC_MODE_MODE] = 0x1). xi. Wait for OTP mode to change (OTPC_STAT_REG[OTPC_STAT_MRDY] = 1). b. Reading: i. Set up OTP read mode (OTPC_MODE_REG[OTPC_MODE_MODE] = 0x2). ii. Wait for OTP mode to change (OTPC_STAT_REG[OTPC_STAT_MRDY] = 1). iii. Read OTP word. iv. Put the OTP in STBY mode (OTPC_MODE_REG[OTPC_MODE_MODE] = 0x1). v. Wait for OTP mode to change (OTPC_STAT_REG[OTPC_STAT_MRDY] = 1). |
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